632 research outputs found
Meira tedeschii Pierotti, 2014, n. sp.
No full textMeira tedeschii n. sp. Holotype male: “Elba (LI), Capoliveri, Innamorata, 150 m, 26.XI. 2013, leg. Pierotti” (PIE; to be deposited at 'Giacomo Doria' Natural History Museum in Genoa). Paratypes: same data as the holotype except “leg. Diotti” (DIO, 1 ex.), “leg. Forbicioni” (FOR, 6 exx.), “leg. Monzini” (MON, 3 exx.), “leg. Pierotti” (MMI, 1.ex; OSE, 1 ex.; PIE, 16 exx.); “leg. Tedeschi” (CAL, 1 ex.; TED, 5 exx.); “Elba (LI), Capoliveri, Ripe Alte, 27.XI. 2013, leg. Forbicioni” (FOR, 4 exx.), “leg. Pierotti” (PIE, 1 ex); “ Isola d’Elba (LI), Capoliveri, Innamorata, 150 m, 25.11.2012, leg. Tedeschi (TED, 1 ex.); “Elba (LI), Capoliveri, monte Calamita, c/o pozza antincendio, 340 m, 7.X. 2013, leg. Bellò” (BEL, 4 exx.); Capoliveri (LI), M. Calamita, Pontimento, 45 ° 43 ' 56 " N 10 ° 22 ' 54 " E, 8.I. 2014, leg. Forbicioni (FOR, 2 ex); Capoliveri (LI), M. Calamita, Calone, 45 ° 43 ' 24 " N 10 ° 24 ' 47 " E, 8.I. 2014, leg. Forbicioni (FOR, 1 ex). Description. Body medium sized (length 2.3 -3.0 mm), elongate. Dorsal vestiture consisting of small scales, rather or hardly imbricated, pale umber, mostly unicoloured, sometimes in small paler groups along odd interstriae, with or without shiny reflections, and of somewhat short setae, recumbent or subrecumbent on dorsum and elytral sides. Rostrum transverse, pterygia moderately developed, clypeus slightly curved, not or just grooved; frons transverse, somewhat depressed or foveolate. Eyes oval, convex. Antennae quite robust, with scape slightly wider at base than at apex; funicle less robust than scape, with first article longer than subsequent two articles taken together, second article shorter than subsequent two articles taken together, articles 3–6 transverse, similar in length; seventh article a little narrower; club thick, drop-shaped, with first article widely flared. Pronotum more (females) or less (males) transverse, with sides angulately rounded, at base as wide as at apex, on dorsum with double punctuation, with broad punctures somewhat close each other. Elytra elongate, with parallel or very weakly rounded sides, punctures of striae rather close, interstriae almost flat. Legs fairly slender; protibiae almost straight, curved inwards at apex. Penis in lateral view curved towards apex (fig. 1), in dorsal view with a scutiform profile at apex (fig. 2); internal sac without additional spicules. Spiculum ventrale with elongate manubrium. Spermatheca with cornu and ramus quite well developed (fig. 3). Coxites of ovipositor strongly narrowed, but not tapered, in preapical region; here strongly sclerotized, fairly sinuous, and converging at apex (fig. 4). Derivation of species name. This species is named in honour of my dear friend and colleague Michele Tedeschi, who was the first to collect it. Distribution. Island of Elba. Ecological notes. The specimens of the type series were collected at 150 meters above sea level, mainly under Lavandula stoechas L. Taxonomic notes. The new species (fig. 5) is distinguishable from M. diottii by the absence of additional spicules in the internal sac of the penis, from M. baudii, M. etrusca, M. sabina Pierotti, 2012 and M. umbra Pierotti, 2013 by the more slender shape, the elytra with parallel or very weakly rounded sides and with almost flat interstriae, the elytral setae recumbent or subrecumbent also on the shoulders, and especially by the coxites of the ovipositor narrower and sclerotised in the preapical region. Moreover, M. tedeschii differs from M. sabina and M. etrusca by the funicle less thick, and from the latter also by the elytral setae shorter. The already highlighted intraspecific variability of many characters, and in particular that of the apical part of the penis (Pierotti, 2011), leads one to hypothesize that the Italian species—with the exception perhaps of M. baudii, M. diottii, and M. oenotria— are entities still under differentiation from a unique ancestor.Published as part of Pierotti, Helio, 2014, New or interesting Peritelini of the west-palaearctic fauna. XXV. A novel Italian species of the genus Meira Jacquelin Du Val (Coleoptera, Curculionidae, Entiminae), pp. 293-296 in Zootaxa 3873 (3) on pages 293-295, DOI: 10.11646/zootaxa.3873.3.8, http://zenodo.org/record/22991
La Torre pendente di Pisa, di C.L. Ragghianti (ediz. postuma); La Torre che vive, postpresentazione di Piero Pierotti, Firenze, seleArte monografie
No full textDiscussione su Italian Industrial Literature and Film Perspectives on the Representation of Postwar Labor, a cura di Carlo Baghetti, Jim Carter e Lorenzo Marmo, Oxford, Peter Lang, 2021
No full textIl contributo risponde alle letture critiche offerte da Federico Pierotti e Carlo Tirinanzi De Medici a proposito del volume "Italian Industrial Literature and Film. Perspectives on the Representation of Postwar Labor", a cura di Carlo Baghetti, Jim Carter, Lorenzo Marmo, edito all’interno della collana Italian Modernities, curata da Pierpaolo Antonello e Robert Gordon per i tipi di Peter Lang (Oxford, 2021). Nel rielaborare gli spunti dei due studiosi summenzionati, si cerca anche di mappare le possibili vie di sviluppo del dibattito interdisciplinare e transmediale sul tema
Pseudomeira eremita Pierotti & Bellò & Alonso-Zarazaga 2010, sp. n.
No full textPseudomeira eremita sp. n. (Figs. 26a–b, 52c, 73) urn:lsid:zoobank.org:act: 2CCA9ECA-5E0C-434A-960C-646F4C3C33CF Diagnosis. Species of medium size (4.3–5.0 mm), characterised by a subquadrate rostrum, robust funicle, rather small but very convex eyes distinctly projecting beyond the genae, elongate elytra widest across humeral calli, protibiae curved inwards near apex and ochreous coloration. Description. Body outline elongate, widest across humeral calli. Dorsal vestiture composed of rounded to slightly oblong scales, brown with weak bronze shimmer, and of moderately long setae, not much broadened before apex, evidently reclinate on elytral declivity. Rostrum strongly transverse, sides almost straight, not or weakly convergent apicad; epistome not or hardly notched, epistomal keel present, pterygia weakly prominent. Frons very wide. Eyes rounded, subconical, prominent, rather small, diameter shorter than distance between front margin of eye and hind margin of pterygium or than width of epistome. Antennae with scape not very robust, curved, usually incrassate from base to apex; funicle rather elongate, desmomere 2 no more than 2.5 times as long as wide, desmomeres 6 and 7 moniliform or transverse; club elongate, first segment widely cup-shaped. Pronotum transverse, sides rounded. Elytra elongate, widest across humeral calli, weakly rounded at sides, striae with evident punctures in spite of vestiture, each puncture with a moderately robust, elongate microseta, interstriae weakly convex. Tibiae elongate, protibiae on outer margin widely rounded before apex, slightly curved inwards. Aedeagus in dorsal view subtruncate in preapical region, angles widely rounded, very shortly papillate at apex (Fig. 26a); endophallic structures as in Fig. 26b. Spermatheca as in Fig. 52c. Etymology. A Latin noun in apposition, referring to the isolation of the environment where it has been found. Distribution. Balearic endemite: island of Mallorca (Fig. 73). Material examined. Holotype male: Mallorca, Sa Moleta, Nus sa Corbata, 27.IV.2004, leg. Pierotti (MMA); paratypes: Baleares: do., 27.IV.2004, leg. Pierotti (10 BEL, 1 OSE, 9 PIE), Soller, Sierra de Torrellas, 20.4.93, leg. Pierotti (1 BEL, 1 PIE); do., 26.5.95, leg. Pierotti (1 BEL, 1 PIE); do., 29.4.2000, leg. Bellò (1 BEL); do., leg. Pierotti (1 PIE); Mallorca, Bal. Soller, leg. Frnkl. Müller (2 FOR); Soller, Camino a Moncaire, C-710, Km. 41, 27.IV.2004, leg. Pierotti (1 BEL, 2 PIE); E. Mallorca, 1,5 Km. S. Lluc S. ra de Tramuntana, Puig Galileu, N 30°48’54’’ E 02°51’28’’, 1062 m., 21.8.2004 leg. Stüben (2 STU), E. Mallorca, 7 Km. NE Lluc. S. ra de Tramuntana, Tomir Mt. (Umg. Binifaldo) N 39°50’14’’ E 02°55’06’’, 910 m., 25.8.2004, leg. Stüben (1 STU). Biology. Collected among fallen leaves of Quercus ilex L. subsp. ilex (Fagaceae), Pistacia lentiscus L. (Anacardiaceae), Smilax aspera L. var. balearica Willk. (Smilacaceae) and Teucrium subspinosum Pourret (Lamiaceae).Published as part of Pierotti, Helio, Bellò, Cesare & Alonso-Zarazaga, Miguel A., 2010, 2376, pp. 1-96 in Zootaxa 2376 on page 2
Euplister megalophthalmus Pierotti & Bellò & Alonso-Zarazaga 2010, sp. n.
No full textEuplister megalophthalmus sp. n. (Figs. 36a–b, 55c, 75) urn:lsid:zoobank.org:act: 925F6092-E721-4A29-903F-146B488D3CEA Peritelus susanae Seidlitz sensu Roudier, 1962: 31; Gurrea Sanz & Sanz Benito, 2000: 239. Diagnosis. Species of small size (3.6–4.6 mm), characterised by indistinct pterygia, narrow antennal funicle, very large eyes, and subglobose elytra, with scales not or hardly imbricate and setae grouped in desquamulate areoles on elytra. Description. Body outline globose. Dorsal vestiture of elongate scales on head and pronotum, tear-shaped and not or hardly imbricate on elytra, almost uniformly brown or grey or with a discal band on pronotum and elongate paler or silvery spots on even interstriae, always with metallic shimmer, and of appressed setae of similar width as scales; vestiture on sides of head and pronotum of paler scales and finer setae. Head transverse, sides more (female) or less (male) converging apicad. Rostrum transverse, pterygia obsolete or obsolescent; metarostrum elongate, with median keel. Frons hardly wider than metarostrum, with vestigial median fovea. Eyes large, convex, not prominent beyond genae. Antennae more (male) or less (female) robust, scape not incrassate from base to ca. two thirds of length, funicle moderately robust, desmomere 1 a little longer than 2, this a little shorter than 3+4, 3 a little longer than wide, 4–7 usually moniliform, rarely transverse; club more or less elongate, first segment widely cup-shaped. Pronotum distinctly transverse, wider at base than at apex, rounded at sides, punctures not particularly dense, superficial. Elytra subglobose, strial punctures close, not completely covered by scales, interstriae almost flat. Legs not particularly robust, tibiae strongly widened at apex, metatibiae on inner margin with a series of more (male) or less (female) developed denticles. Aedeagus in dorsal view broadly cordiform in pre-apical region (Fig. 36a); endophallic structures as in Fig. 36b. Spermatheca as in Fig. 55c. Etymology. The specific epithet is an adjective of Greek origin referring to the large eyes. Distribution. Iberian endemite: north-eastern Spain: Catalonia (Fig. 75). Material examined. Holotype male: Monistrol, 04, leg. Strobl (GON); paratypes: Barcelona: Monistrol, 04, leg. Strobl (1 GON, 1 FLE, 2 SOL); Barcelona, Prat, 4.61, Mones leg. (2 MBA); Olérdola, 26. V.60, Lagar leg. (1 MBA); Barcelona, 30.V.1929, Dr. W. Eichler (1 FLE); Besós, 28.III, leg. Zariquiey (2 SOL); Prat, 4.63, leg. González (1 MBA). Lérida: Lerida, Catalogne, Espagne, IV.55 (2 HOF); do., IV.55, Pardo (1 HOF); do., Pardo Alcaide (2 HOF); Sonadell, Lérida, 2. VI.63 leg., J. Ribes (4 MBA); El Soleras, Lérida, 6.IV.66, leg. J. Ribes (2 MBA). Tarragona: C-246 près La Bisbal del Penedés, 29.IV.1995, sur cirse, J.M. Ehret rec. (1 BEL, 1 PIE); Tarragona, Valls, Esp. (1 HUS); Valls, Tarragona, leg. Español (3 MBA); Hisp., prov. Tarragona, Torredembarra, 8.4.84, Gfeller leg. (2 BEL, 1 PIE); Tarragona, Altafulla, N 41º08.692 " E 01º20.989 ", 3.4.2004, leg. Bellò (30 BEL, 1 OSE, 9 PIE); do., leg. Pierotti (1 MPA, 1 OSE, 20 PIE); do., 6.VI.2005 leg. Bellò (1 BEL); do., leg. Pierotti (1 PIE); Tarragona, Creixell de Mar, N 41º09.736 " E 01º25.605 ", 3.4.2004, leg. Bellò (5 BEL); do., leg. Pierotti (3 PIE). Biology. One adult collected on Cirsium sp. (Asteraceae).Published as part of Pierotti, Helio, Bellò, Cesare & Alonso-Zarazaga, Miguel A., 2010, 2376, pp. 1-96 in Zootaxa 2376 on pages 40-4
Exact solution of the wave resistance problem for a submerged cylinder.II. The non-linear problem
No full textSolvability of a plane elliptic problem for the flow in a channel with a surface-piercing obstacle
No full textLet us consider the three-dimensional problem of the steady flow of a heavy ideal fluid past a surface-piercing obstacle in a rectangular channel of constant depth. The flow is parallel at infinity upstream, with constant velocity c. We discuss an approximate linear problem obtained in the limit of a "flat obstacle". This is a boundary value problem for the Laplace equation in a three-dimensional unbounded domain, with a second order condition on part of the boundary, the Neumann-Kelvin condition. By a Fourier expansion of the potential function, we reduce the three-dimensional problem to a sequence of plane problems for the Fourier coefficients; for every value of the velocity c, these problems can be described in terms of a two parameter elliptic problem in a strip. We discuss the two dimensional problem by a special variational approach, relying on some a priori properties of finite energy solutions; as a result, we prove unique solvability for 〖c≠c〗_(m,k) where c_(m,k) is a known sequence of values depending on the dimensions of the channel and on the limit length of the obstacle. Accordingly, we can prove the existence of a solution of the three-dimensional problem; the related flow has in general a non trivial wave pattern at infinity downstream. We also investigate the regularity of the solution in a neighborhood of the obstacle. The meaning of the singular values c_(m,k) is discussed from the point of view of the nonlinear theory
Heteromeiropsis zariquieyi
No full textHeteromeiropsis zariquieyi (Solari) (Figs. 5a, 41a, 42a–c, 53b, 76) Heteromeira zariquieyi Solari, 1955: 58; Pierotti & Bellò, 1994: 296; Pierotti & Bellò, 1998: 107; Gurrea Sanz & Sanz Benito, 2000: 184; Alonso-Zarazaga, 2002: 24. Heteromeiropsis zariquieyi (Solari): Pierotti & Bellò, 2004: 589. Diagnosis. Species of medium size (4.2–5.2 mm), characterised by elytra particularly elongate in male, with sides subparallel and apex markedly ogival, and by elytral setae erect or suberect. Ventrites as in Fig. 5a, aedeagus as in Fig. 41a, apical, median and gonoporal groups of endophallic structures as in Figs. 42a–c; spermatheca as in Fig. 53b. Distribution. Iberian endemite: north-eastern Catalonia (type locality: Catalonia: Figueras). Apparently occurring in all of province of Gerona and probably scattered to province of Barcelona. Spanish literature records: Gerona: Figueras (type loc.), Olot, Coll de Cannes (Solari, 1955); Figueras (Pierotti & Bellò, 1994); Camallera (Pierotti & Bellò, 2004). Material examined (Fig. 76). Holotype, labelled: 1) Figueras, Cataluña, X.1915, Zariquiey; 2) Cataluña, Figueras, musgo, X.15, Zariquiey; 3) Heteromeira zariquieyi m., holotypus, det. F. Solari (SOL). Other specimens: Spain: Gerona: Figueras, 3.II.51, leg. Bech (GON); do., 15. V.92, leg. Bellò (BEL); do., leg. Pierotti (PIE); Camallera, 1. VI.98, 11. V.00, 3. V.01, leg. Pierotti (BEL, PIE); Hostalets d’en Bas, VI –II.23, leg. Codina (MBA). Barcelona: Pla d’Aiats, 16.VII.23, leg. Codina (MBA); San Quirze de Besora, II.34, leg. Museu (MBA). Biology. Collected among fallen leaves of Quercus ilex L. (Fagaceae) by Figueras and of Olea europaea L. (Oleaceae) by Camallera.Published as part of Pierotti, Helio, Bellò, Cesare & Alonso-Zarazaga, Miguel A., 2010, 2376, pp. 1-96 in Zootaxa 2376 on pages 33-3
Variational linear problems in wave- obstacle interaction.
No full textWe discuss the problem of the steady two-dimensional flow past fixed disturbances
in an open channel of finite depth. We consider different types of obstacles: submerged or
surface-piercing bodies and localized perturbations of a horizontal bottom. By a special variational
approach, we prove the unique solvability of the linearized problem for supercritical
velocities of the unperturbed flow. We also discuss extensions of the variational method to the
limit case of a submerged beam and to subcritical velocities
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